/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineSessionInterface.h
Destroys the specified online session NOTE: online session de-registration is an async process and does not complete until the OnDestroySessionComplete delegate is called.
true if successful destroying the session, false otherwise
bool DestroySession ( [FName](API\Runtime\Core\UObject\FName) SessionName, const [FOnDestroySessionCompleteDelegate](API\Plugins\OnlineSubsystem\Interfaces\FOnDestroySessionCompleteDelegat-) & CompletionDelegate )